Flora of North America species comparison

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Heuchera maxima

island alumroot, jill-of-the-rocks
Habit Herbs caulescent; caudex branched.
Flowering stems

9–30 cm, short or long stipitate-glandular, viscid.
Leaves

petiole (7–22 cm), densely long stipitate-glandular;

blade pentagonal to septagonal, deeply 5-lobed, 6.3–17 cm, base deeply cordate, lobes rounded, margins crenate, apex obtuse, surfaces long stipitate-glandular abaxially, glabrous adaxially except long stipitate-glandular near margins, viscid.
Inflorescences

dense.
Flowers

hypanthium radially symmetric, free 0.3–1.4 mm, white to pink, hemispheric, 2.5–4.2 mm, densely long stipitate-glandular;

sepals somewhat spreading, green- or red-tipped, equal, 0.7–2 mm, apex rounded or truncate, (medium to long stipitate-glandular);

petals spreading, white, oblong-lanceolate, (clawed), unlobed, 2–4 mm, margins entire;

stamens exserted 0.4–2.5 mm;

styles exserted to 2 mm, 1.5–4 mm, 0.1+ mm diam.
Capsules

ovoid, 4–8 mm, beaks divergent, not papillose.
Seeds

black, broadly fusiform, 0.4 mm.
2n

= 14.

Heuchera maxima
Phenology Flowering Mar–May.
Habitat Exposed cliffs
Elevation 0-500 m (0-1600 ft)
Distribution
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
Discussion

Of conservation concern.

Heuchera maxima is found on the northern Channel Islands (Anacapa, Santa Cruz, Santa Rosa), Santa Barbara County.

Heuchera maxima is in the Center for Plant Conservation’s National Collection of Endangered Plants.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 8, p. 93.
Parent taxa Saxifragaceae > Heuchera
Sibling taxa
H. abramsii, H. alba, H. americana, H. bracteata, H. brevistaminea, H. caespitosa, H. caroliniana, H. chlorantha, H. cylindrica, H. eastwoodiae, H. elegans, H. glabra, H. glomerulata, H. grossulariifolia, H. hallii, H. hirsutissima, H. longiflora, H. merriamii, H. micrantha, H. novamexicana, H. parishii, H. parviflora, H. parvifolia, H. pilosissima, H. pubescens, H. pulchella, H. richardsonii, H. rubescens, H. sanguinea, H. villosa, H. wootonii
Name authority Greene: Bull. Calif. Acad. Sci. 2: 149. 1886 ,
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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